Island



(No Model.)

B. T. POTTER.

MAGIC LANTERN SLIDE.

No. 390,396. Patented Oct. 2, 1888.

WITNESSES. UVVE/VTUI? ZSLZL m llniiran *rrrrns EDlVARD T. POTTER, OF NEIVPORT, RHODE ISLAND,

MAGIC LANTERN SLIDE.

QPECIPICATION forming part of Letters Patent; No. 390,396, dated October 2, 1888.

Application lilcd Der-ember 14, 1867. Serial No. 257,833. No model.)

To (tZZ whom, it may concern.-

Be it known that I, Enw run T. lo'r'ren, a citizen ofthc United States, residing at'Newport, in the county of Newport and State of Rhode Island, have invented certain new and useful Improvements in Magic Lanterns, of which the following is a specification, reference being had to the drawings accompanying and forming a part of the same.

Heretofore the views or the advertising or similar text and whatever of the kind is to be projected on a screen by a magic lantern have been painted, photographed, orsimilarly portrayed on separate slides of glass, prepared paper, or other translucent medium, of sizes which vary according to circumstances, and which must be successively inserted and withdrawn by an attendant. This is a somewhat laborious operation, requiring considerable care, skill, and experience to produce a good effect; but the change of views by the substitution of plates produces an'unpleasant effect upon the eye, which has heretofore been improved npon only by the employment of a compound systenrof lenses in an instrument known as a ,dissolvingview lantern.

The object of my invention is to remedy this in a simple and economical way, and to render the operation continuous, so that a panoramic picture oralong written orprinted article or address maybe shown on a screen by a magic lantern without breaks, and may without interruption in the text orpicture be seen or read continuously, like a panorama or an ordinary letter or column ofprint. To carry out this object I use with a magic lantern a continuous flexible band or strip, upon which the scenes, figures, or textto be reproduced are painted or otherwise portrayed. Any transparent or translucent and flexible substance may be used for the band, such as paper,treated in well-known ways, or cell dion or other cellulose compounds. Upon such aband Ipaint or in any suitable manner apply views of whatever kind or character may be desired. I furnish a-lantern with two or more reels or spools and wind off the band from one onto another, drawing the band through the beam of light in proper position with reference to the lenses to project or reflect the views upon the screen.

By the expression continuous strip I mean to imply an extended strip or band capable of being rolled or wound up, on which a series of views or the text of an extended article may be depicted, this in contradistinction to a short sheet, plate, or slide such as has commonly been employed.

In order to intensify and to vary the effect produced by a magic lantern, I also stamp or punch out the letters and numbers,and sometimes parts of the figures and scenes, so as to permit the light-rays to pass through the perforations to the screen. In such cases, where the scenes on the screen are produced in part or whole by the direct rays of light, it is obvious that an opaquematerial may be used for the band. The perforations forming any given character or figure may be connected, or may be a number of small perforations, as hcreiir after described.

I employ as a means of impelling the band a clock mechanism or a source of power controlled by clock-work or its equivalent, so as to keep up a steady and even motion of the band.

Referring to the drawings, Figure 1 is a perspective view of the entire apparatus with my improvement applied. Fig. 2 is a section of the flexible band, exhibiting the perforated letters.

It will be understood that the invention is not restricted to any particular form of magic lantern, nor to any particular device or means for drawing the continuous band through the same. So, therefore,,in illustrating the nature of theinvcntion I have selected a typical and convenient form of instrument, which embodies the principle and mode of operation merely of the improvement.

Let A represent the case of an ordinary magiclantern. B is the lenstube, and O a plate to which it is secured, and between which and the case A is a passage-way,th rough which the band D is drawn in either a vertical or horizontal direction.

For convenience, the box or case A is pro vided with thelegs E, and under the box is mounted a reel orspool, F. The shaft of this spool is provided with means for turning it. This may be an ordinary handle; but I prefer to use some form of motor, such as a train of IOO clockwork, one member or gear of which, G, is shown as supported in the frame H. The train gears with the shaft or with the wheel G.

A spool or reel, K, is mounted in bearings above the case A. This spool carries the band, which is drawn off and reeled onto the lower spool, F, by the rotation of the latter.

In Fig. 2 a section of the band is shown, in which the letters are made by thelines of per forations. In a similar manner parts of any view or picture may be cutaway to permit the passage of the rays of light through the paper. The particular manner ofmaking these perforations is immaterial.

The band, which I have stated above may be of paper treated with any of the many well-known substances for rendering it trans parent or translucent, is prepared or printed with the scenes or pictures or text, so that the movement of the band will bring thesame to View in proper order or succession. \Vheu a long article or address is to be shown, it will be advisable to print or prepare it in lines running across the band, so that it may be presented by a vertical movement of the band. In this manner I may exhibit panoramas, addresses, operatic or dramatic scores, sermons, and the like.

What I claim as my invention is 1. As a new article of manufacture, a magicby perforations through the band or strip, as

set forth.

3. The combination, with a magic lantern, of reels or spools carrying a continuous band or strip of flexible transparent or translucent material upon which the views or figures are portrayed, the reels being placed in position to direct the hand through the lantern,whereby an enlarged image will be projected by the lantern, and a motor for drawing the hand through the lantern from one reel to the other, as set forth.

S gned this 8th day of December, 1887.

EDWARD T. POTTER.

Witnesses:

R. F. GAYLORD, PARKER W. PAGE. 

